#ifndef SPAS_CLIENT_H
#define SPAS_CLIENT_H

#include "param_list.h"

#ifdef __cplusplus
extern "C" {
#endif

#ifdef __cplusplus
	namespace metaqSignature {
#endif

#define SPAS_MAX_KEY_LEN 128 /* max access_key/secret_key length */
#define SPAS_MAX_PATH 256 /* max credential file path length */
#define SPAS_ACCESS_KEY_TAG "accessKey" /* access_key tag in credential file */
#define SPAS_SECRET_KEY_TAG "secretKey" /* secret_key tag in credential file */
#define SPAS_CREDENTIAL_ENV "SPAS_CREDENTIAL" /* credential file environment variable */


		typedef enum {
			SIGN_HMACSHA1 = 0, /* HmacSHA1 */
			SIGN_HMACSHA256 = 1, /* HmacSHA256 */
		} SPAS_SIGN_ALGORITHM;

		typedef enum {
			NO_UPDATE = 0, /* do not update credential */
			UPDATE_BY_ALARM = 1, /* update credential by SIGALRM */
#ifdef SPAS_MT
			UPDATE_BY_THREAD = 2, /* update credential by standalone thread */
#endif
		} CREDENTIAL_UPDATE_MODE;

		typedef enum {
			NO_ERROR = 0, /* success */
			ERROR_INVALID_PARAM = -1, /* invalid parameter */
			ERROR_NO_CREDENTIAL = -2, /* credential file not specified */
			ERROR_FILE_OPEN = -3, /* file open failed */
			ERROR_MEM_ALLOC = -4, /* memory allocation failed */
			ERROR_MISSING_KEY = -5, /* missing access_key/secret_key */
			ERROR_KEY_LENGTH = -6, /* key length exceed limit */
			ERROR_UPDATE_CREDENTIAL = -7, /* update credential file failed */

		} SPAS_ERROR_CODE;

		typedef struct _spas_credential {
			char access_key[SPAS_MAX_KEY_LEN];
			char secret_key[SPAS_MAX_KEY_LEN];
		} SPAS_CREDENTIAL;


		extern int spas_load_credential(char *path, CREDENTIAL_UPDATE_MODE mode);
		extern int spas_set_access_key(char *key);
		extern int spas_set_secret_key(char *key);
		extern char * spas_get_access_key(void);
		extern char * spas_get_secret_key(void);
		extern SPAS_CREDENTIAL * spas_get_credential(void);

#ifdef SPAS_MT

		extern int spas_load_thread_credential(char *path);
		extern int spas_set_thread_access_key(char *key);
		extern int spas_set_thread_secret_key(char *key);
		extern char * spas_get_thread_access_key(void);
		extern char * spas_get_thread_secret_key(void);

#endif

		extern char * spas_get_signature(const SPAS_PARAM_LIST *list, const char *key);
		extern char * spas_get_signature2(const SPAS_PARAM_LIST *list, const char *key, SPAS_SIGN_ALGORITHM algorithm);
		extern char * spas_sign(const char *data, size_t size, const char *key);
		extern char * spas_sign2(const char *data, size_t size, const char *key, SPAS_SIGN_ALGORITHM algorithm);
		extern void    spas_mem_free(char *pSignature);
		extern char * spas_get_version(void);

#ifdef __cplusplus
	}
#endif

#ifdef __cplusplus
}
#endif

#endif

